the only way you can screw up a warranty is if the dealer can PROVE that the aftermarket part is what caused the failure. For instance if you changed rear end gears, they cant say they wont replace youre cd unit because of this...
Anyways, tint out the headlights, raxiom smoked taillights, mgw short throw shifter, cdc chin spoiler, etc
2011 grabber blue 5.0 premium
2003 Mach 1 (torch red) #3838
1999 Cobra convertible #342